Datejust Z series owners! (help!)

[juricrod]

hello everybody!

I wonder if anyone has had the opportunity to see the gasket that is inside the crown (not the tube). I ask this because for more than what I tried I could not, and also amaze me as the crown is flush with the case and still be guaranteed to resist 100m. Does anyone knows if the datejust that was made in that year has a different technology in water resistance matters? And if someone that owns a Datejust of the Z series has ever swam with his watch and has encountered some problem?

If any TRF member that don't have the Z series Datejust or even a Datejust has a theory?

[GradyPhilpott]

You may find these links helpful.

http://www.loosediamondfactory.com/g...mechanism.html

http://www.horologist.com/rolex_crown.htm

[juricrod]

Thanks for the post. But I'm referring to the fact that when pulling the crown to the rearmost position, i try to reach to see the black gasket inside the crown and i can't and i want to know if someone had done it. In addition creates doubt in me (about the water resistance capacity of the watch) the fact that the crown is flush with the case. And if somebody with a Datejust Z series has swam with his watch and didn't has problem at all with the watch.

Some comments please!

[juricrod]

Nobody with the knowledge of this issue?

[Tools]

Originally Posted by juricrod

Nobody with the knowledge of this issue?

It's probably not the issue of knowledge, it's perhaps the question..


A Twinlock crown has it's main water protection inside the tube, around the stem, (the same as waterproof watches without a screw crown) and so the watch is waterproof even if you do not screw the crown down. The second barrier (hence Twin-lock) is the gasket at the top of the crown, like a lid on a jar of pickles, that contacts the top of the tube.

If your crown actually contacts the top of the case, then the secondary barrier gasket inside the crown may not be optimal. Just take some dental floss and see if it goes under the crown between it and the case. This gasket doesn't need to be particularly tight, simply snug contact..

You cannot see any of the sealing o-rings in a twin-lock without disassembling the crown and tube....

[sirjohnbrian]

I have a TT Z series DJ and I cannot see the gasket. I pulled it out to the position that stops the second hand and sets the time and maybe I can see something under the winding cap but it could just be the light.

That being said, I also have a midsize DJ and I used that to scuba dive before I picked up my DSSD and it was watertight to about 90 feet.